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PCI DSS 4.0 Compliance Guide for Small Merchants in 2026

PCI DSS 4.0's transition period ended March 31, 2025, so every merchant assessment from 2026 onward now enforces mandatory payment-page script monitoring, MFA for all cardholder-data access, and authenticated internal vulnerability scans — noncompliance risks $5,000-$100,000 monthly fines from acquiring banks plus an average $173,692 added breach cost per IBM's research.

Payroll Tax Deposit Lookback Period: Monthly vs Semiweekly Depositor Guide

The IRS payroll tax deposit lookback period runs from July 1 of the second preceding year through June 30 of the prior year; employers reporting $50,000 or less in that window deposit monthly, those above it deposit semiweekly, and accumulating $100,000 or more in liability on a single day triggers a next-day deposit requirement and semiweekly status through the following year.